OnTimeStats

Historical on-time performance

Denver to Phoenix

602 miData through May 2026Source: US DOT · BTS

Flights on DEN–PHX arrive on time 75% of the time over the last 12 months.

On-time rate75%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled0.9%of scheduled flights

based on 8,756 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • United Airlinesbest
    On-time80%
    Medianon time
    p9040 min
    Cancel0.4%
    Flights2,378
  • Envoy Air
    On-time80%
    Medianon time
    p9030 min
    Cancel0.0%
    Flights83
  • American Airlines
    On-time76%
    Medianon time
    p9045 min
    Cancel0.8%
    Flights959
  • Frontier Airlines
    On-time76%
    Medianon time
    p9050 min
    Cancel0.6%
    Flights1,401
  • Southwest Airlines
    On-time71%
    Medianon time
    p9050 min
    Cancel1.3%
    Flights3,935

Why flights run late

Delay causes

  • Airline35%
  • Weather1%
  • Air traffic (NAS)15%
  • Late aircraft48%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

When flights don't go

Why flights were cancelled

  • Airline53%
  • Weather26%
  • Air traffic (NAS)21%
  • Security0%

Most cancellations here are attributed to Airline. Shares are among 77 cancellations with a reported cause (BTS reports causes from June 2003).

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly DEN → PHX

All airlines · rolling 36 months (2023-06 .. 2026-05).

Best time of day

Mornings are the most reliable time of day to fly this route — 85% on time.

  • Mornings85% on time · p90 20 min · 7,799 flights
  • Middays82% on time · p90 30 min · 6,425 flights
  • Afternoons71% on time · p90 50 min · 4,491 flights
  • Evenings65% on time · p90 70 min · 5,206 flights
  • Overnights63% on time · p90 70 min · 3,791 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 72% to 80% on time.

  • Tuesdays80% on time · p90 35 min · 3,742 flights
  • Wednesdays78% on time · p90 40 min · 3,861 flights
  • Saturdays78% on time · p90 35 min · 3,396 flights
  • Mondays76% on time · p90 45 min · 4,162 flights
  • Sundays73% on time · p90 50 min · 4,165 flights
  • Fridays73% on time · p90 50 min · 4,198 flights
  • Thursdays72% on time · p90 50 min · 4,191 flights

Keep exploring

Related pages

Delay predictorfor this route→DEN airportDenver→PHX airportPhoenix→Southwest Airlinesairline profile→United Airlinesairline profile→Frontier Airlinesairline profile→Seasonal delay patternsguide→

Methodology

A flight is on time when it arrives within 15 minutes of schedule — the US DOT / BTS standard. Median and p90(the “1-in-10 bad day”) are read from the full arrival-delay distribution, never averaged across periods.

Figures cover a carrier’s own BTS-coded flights. Cells below ~200 flights are flagged as limited data. All numbers are pre-computed from public BTS On-Time Performance data.